President Obama and GOP presidential nominee Mitt Romney walk away after they greet each other at the end of the third presidential debate in Boca Raton, Fla., on Monday. Saul Loeb/AFP/Getty Images hide caption

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The flag of Libya's National Transitional Council (second from right) flies outside the United Nations headquarters building in New York. Stan Honda/AFP/Getty Images hide caption

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CNN's Candy Crowley moderates the second presidential debate between Mitt Romney and President Obama at Hofstra University in Hempstead, N.Y., on Tuesday. Saul Loeb/AFP/Getty Images hide caption

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Republican presidential nominee Mitt Romney and President Barack Obama shake hands at the first presidential debate at the University of Denver, Wednesday. Charlie Neibergall/AP hide caption

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CNN's Candy Crowley at a Mitt Romney campaign event during the Iowa caucuses in January. David Holloway/CNN hide caption

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Republican presidential candidate former House Speaker Newt Gingrich speaks during a Republican presidential debate in Sioux City, Iowa, Thursday, Dec. 15, 2011. Eric Gay/AP hide caption

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